CN101004936A - Information storage device and its control method - Google Patents

Information storage device and its control method Download PDF

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Publication number
CN101004936A
CN101004936A CNA2006101629548A CN200610162954A CN101004936A CN 101004936 A CN101004936 A CN 101004936A CN A2006101629548 A CNA2006101629548 A CN A2006101629548A CN 200610162954 A CN200610162954 A CN 200610162954A CN 101004936 A CN101004936 A CN 101004936A
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Prior art keywords
information
nonvolatile memory
mentioned
storing device
storage medium
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鹰居赖治
吉田贤治
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Toshiba Corp
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Toshiba Corp
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02Addressing or allocation; Relocation
    • G06F12/08Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/0802Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
    • G06F12/0866Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches for peripheral storage systems, e.g. disk cache
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0706Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
    • G06F11/073Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in a memory management context, e.g. virtual memory or cache management
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/004Error avoidance
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751Error or fault detection not based on redundancy
    • G06F11/0754Error or fault detection not based on redundancy by exceeding limits
    • G06F11/076Error or fault detection not based on redundancy by exceeding limits by exceeding a count or rate limit, e.g. word- or bit count limit
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02Addressing or allocation; Relocation
    • G06F12/08Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/0802Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
    • G06F12/0804Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches with main memory updating
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2212/00Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
    • G06F2212/22Employing cache memory using specific memory technology
    • G06F2212/222Non-volatile memory
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Debugging And Monitoring (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

According to one embodiment, the device comprises an input part, a disc-shaped storage medium, a non-volatile memory which becomes a cache memory for the disc-shape storage medium, an acquisition part which acquires status information showing the status of the non-volatile memory, and a control part which outputs the status information acquired by the acquisition part based on a status request command input in the input part.

Description

Information storing device and control method thereof
Technical field
The present invention relates to a kind of information storing device and control method thereof, wherein, information is written in the large-capacity storage media, for example adopts the hard disk of nonvolatile semiconductor memory as cache memory.
Background technology
As everyone knows, recent years, hard disk is being used as the information storage medium with high capacity and high reliability, and has expanded to many fields, is used for record such as computer data, view data, voice data etc.The hard disk size is also reduced, can be installed on the portable electric appts.
So, at present, reduce in the information storing device of size a plan with hard disk, it is believed that by adopting the nonvolatile memory of can fast recording and reading the fast cache memory as hard disk, the speed that information writes down and reads can increase, and by reducing the number of times of access hard disk, that is, reduce the number of times of write and read information on hard disk, can save battery power.
In other words, this information storing device carries out record and read message to the outside by nonvolatile memory, and by hard disk carry out and nonvolatile memory between the information transmission, therefore, from the outside, the read and write operation is very fast, the number of times of access hard disk reduces; Therefore, it is known as the hard disk drive (HDD) of supporting non-volatile (NV)-cache memory, and by standardization.
Here, having realized above-mentioned high-speed record and read message and having realized reducing in the information storing device of hard drive number of times, consider flash memory as coming the nonvolatile memory of work as cache memory.
Yet, but the number of rewrites of flash memory is limited (for example, 100,000 times), and a characteristic is arranged, if promptly overstep the extreme limit, as easy as rolling off a log making a mistake, and reliability step-down.
So, in using the information storing device of nonvolatile memory as the cache memory of hard disk, requirement not only comes conserve energy by the minimizing of hard drive number of times consumingly, but and consider number of rewrites and the user friendliness that nonvolatile memory is limited, require in the record of control information effectively and read operation, to improve to some extent.
Patent Jpn.Pat.Appln.Kokai Publication No.2004-55102 has announced a kind of jumbo storage medium that memory card and HDD are installed.This jumbo storage medium can, for example, the data of the memory card that obtains from the outside backup on the magnetic storage medium hard disk, and can extract the data on the hard disk and pass to memory card.
And patent disclosure Jpn.Patent No.3407317 Publication has announced a kind of portable memory apparatus that uses flash memory.If in order to solve flash memory rewrite frequencies (for example 100,000 time) increase, so wrong incidental problem, this patent Jpn.Patent No.3407317 Publication provide a kind of data control method, but so that just for example suppress the increase of number of rewrites in a special area.
Summary of the invention
Proposition of the present invention is to have considered said circumstances, its target is, a kind of information storing device and control method thereof are provided, can realize the saving of energy, and can realize fast and record and read operation highly reliably, and providing user friendliness aspect the recorded information on as the disk-shaped storage medium of cache memory with nonvolatile memory.
According to an aspect of the present invention, provide a kind of information storing device, it comprises: an importation, and it is constituted as the input that takes orders; Disk-shaped storage medium; Nonvolatile memory, it is constituted as the cache memory as disk-shaped storage medium; Collecting part, it is constituted as the status information of the state that obtains the described nonvolatile memory of demonstration; And control section, it be constituted as based on be input to write order in the above-mentioned importation in nonvolatile memory write information, regularly will be recorded in information stores on the described nonvolatile memory to the storage medium of described dish type and predetermined based on being input to status request output in the described importation in status information that above-mentioned collecting part obtained.
According to another aspect of the present invention, provide a kind of control method of information storing device, wherein comprise: first process, wherein order is transfused to; Second process, wherein based on the write order of being imported in described first process, described information is written in the nonvolatile memory, and this nonvolatile memory has become a cache memory of described disk-shaped storage medium; The 3rd process, wherein, the described information that is recorded in described second process in the above-mentioned nonvolatile memory is stored in the above-mentioned disk-shaped storage medium in predetermined timing; The 4th process wherein, shows that the described status information of state of described nonvolatile memory is obtained; The 5th process, wherein, based on the status request of in described first process, being imported, the described status information that output is obtained in the 4th process.
Additional objects and advantages of the present invention will be illustrated in the following description, and wherein partly is obviously from described description, perhaps can know by putting into practice the present invention.By means and the combination of hereinafter specifically noting thereof, can realize and obtain target of the present invention and advantage.
Description of drawings
Accompanying drawing incorporated and that constitute the part of instructions has shown embodiments of the invention, and with the detailed description of total description that provides above and the embodiment that provides below, is used for explaining principle of the present invention.
Fig. 1 has shown one embodiment of the present of invention, and it is a block scheme, has provided the profile of described information storing device;
Fig. 2 is an exemplary view, has explained the recording areas of flash memory used in the information storing device in the present embodiment;
Fig. 3 is an exemplary view, has explained the counter of flash interface used in the information storing device in the present embodiment;
Fig. 4 is a block scheme, has explained an example of the controller that is used for described information storing device;
Fig. 5 is a block scheme, has shown an example of the main process equipment that is connected to information storing device in the present embodiment;
Fig. 6 is a process flow diagram, has explained an example of the processing operation of main process equipment in the present embodiment;
Fig. 7 is a process flow diagram, has explained an example of the processing operation of present embodiment middle controller; And
Fig. 8 is a process flow diagram, has explained other example of the processing operation of main process equipment in the present embodiment.
Embodiment
Hereinafter, explain one embodiment of the present of invention with reference to the accompanying drawings.Fig. 1 has provided the framework of the described information storing device 11 of present embodiment.Information storing device 11 as described herein relates to a kind of HDD of the NV-of support cache memory, this HDD comes standardization by (Non-Volatile CacheCommand Proposal for ATA8-ACS Revision 5) such as " the non-volatile cache memory order recommendation that is used for ATA8-ACS, revised editions 5 ".
In other words, this information storing device 11 comprise a SDRAM12 with buffer function, in have the hard disk 14 of the large-capacity storage media of the LSI13 of the chip piece of various circuit blocks, a dish type, as a nonvolatile memory and as the flash memory 15 or the similar device of the cache memory of hard disk 14.
In addition, a controller 16 is installed on the LSI13, when information storing device 11 was carried out various processing capacity, this controller 16 became the control section that is used for carrying out overhead control.LSI13 installs has a sdram interface 17, is used for connecting controller 16 and above-mentioned SDRAM12, can carry out the information transmission; A hard-disk interface 18 is used to connect described controller 16 and above-mentioned hard disk 14, can carry out the information transmission; Also have a flash interface 19, be used for connecting controller 16 and above-mentioned flash memory 15, can carry out the information transmission; Also have a host interface 21 etc., it is used for connecting controller 16 and external host device 20, and the information of can carrying out is transmitted or the like.
Here, above-mentioned main process equipment 20 is one, for example, and PC (PC) or similar equipment.When, for example, when carrying out the application software of an appointment, described main process equipment 20 is carried out writing and reading of information by using information storing device 11, and can utilize the storage of information storing device 11 as the final information that obtains.
In this case, main process equipment 20 produces an order, requires writing information to information storing device 11, perhaps produces an order, requires sense information from the information storing device 11.These orders are provided for controller 16 and analyzed by host interface 21.
Therefore, controller 16 control SDRAM12, flash memory 15, hard disk 14 etc. write the information that offers main process equipment 20 selectively, and information is read in main process equipment 20 or the similar device.In addition, controller 16 has a function, can make mutual transmission information between SDRAM12, flash memory 15 and the hard disk 14.
Basically, when when main process equipment 20 is received the request of a write information, controller 16 makes the described write information of flash memory 15 accumulation.When, for example, the storage area of flash memory 15 is occupied to be used more than or equal to a certain degree or when like that, controller 16 passes to hard disk 14 with the information that is accumulated in the flash memory 15, makes hard disk a predetermined regularly storage.
When main process equipment 20 is received the request of a read message, controller 16 is read institute's information requested from hard disk 14, and exports to main process equipment 20.In this case, if the information that is required is present in the flash memory 15, its sense information and export to main process equipment 20 from flash memory 15.
At this moment, add error correcting code for the information (data) that is written in the above-mentioned flash memory 15,, the data of reading are carried out correction process from flash memory 15 based on described error correcting code.
Add error correcting code also for the data that are recorded on the hard disk 14.Based on described error correcting code, the data of reading from hard disk 14 are carried out correction process.
In this embodiment, the much better than method of correction process that the data of record are carried out in a kind of error correcting capability comparison flash memory 15 is used to the data of record on the hard disk 14 are carried out correction process.In other words, the data of record have much higher reliability than the data that write down in the flash memory 15 on the hard disk 14.
Still in this embodiment, for example, define the information read and write unit that above-mentioned flash memory 15 has the 2k byte.In addition, define the erase unit that this flash memory 15 has the 128k byte.When the number of times of write and read became big, flash element worsened, and the frequency that mistake occurs just increases.So as the information of the performance that guarantees this element, the number of times of rewriting is defined as about 100,000.
Hereinafter, be described in the various command of setting up in the above-mentioned standard, these orders can be used in information storing device 11, and for explaining that present embodiment is necessary.At first, (logical block address LBA) writes the LBA of information from hard disk 14 flash memory 15 LBA (Logical Block Addressing) of first order appointment.
Identical with first command, second command specifies LBA to write in flash memory, still requires simultaneously from the information of hard disk 14 playback records in described LBA, and described information of reading is write in the flash memory 15.
Above-mentioned first and second orders corresponding the PI=0 and the PI=1 of " Add LBA (s) to NV CachePinned Set " (LBA being added to the pinning group of non-volatile cache memory) in the above-mentioned standard, and in flash memory 15, be endowed one and be known as the attribute information of " pinned (pinning) " by the LBA of main frame 20 demanded storage information.
Article three, a LBA on the hard disk 14 is specified in order, and requires write information.When main process equipment 20 produced described the 3rd order, controller 16 was checked the LBA that whether has a pinning attribute information to meet the requirements and write.If the information that meets is arranged, then controller 16 is carried out in corresponding the zone that requires the LBA that write in flash memory 15 and is write.
On the other hand, when not having the pinning attribute information to meet the requirements the LBA that is write, whether controller 16 determines whether in flash memory 15 writing information in corresponding the zone of appointed LBA by self judgement, perhaps write in the LBA of hard disk 14 the above appointment, and finish and write.
Article four, order is specified a LBA on the hard disk 14 and is required read message.When main process equipment 20 produces described the 4th order, if the result that controller 16 is judged is, in flash memory 15, distributed corresponding zone of specifying LBA, and, so just require controller 16 from flash memory 15, to read corresponding information in the information updating of the information of this area stores than hard disk 14.
On the other hand, when in hard disk 14 and flash memory 15, having identical information, controller 16 can be from flash memory 15 corresponding require sense information, perhaps appointed LBA sense information from hard disk 14 in the zone of the LBA that read.
Corresponding specify the zone of LBA when in flash memory 15, having distributed, but on hard disk 14, have up-to-date data, require controller 16 appointed LBA sense information from hard disk 14 so.When read message from hard disk 14, controller 16 judges whether described information stores in flash memory 15.
Attribute information at those pinnings does not wherein meet among the LBAs of the LBA that is required write and read information, for example in above-mentioned third and fourth order, in flash memory 15, be assigned with a zone and wherein information be written in the attribute information that LBAs in flash memory 15 the above zone that are assigned with is endowed and is called " not pinning (unpinned) ".
Then, the LBA that is endowed the pinning attribute information is known as the LBA of pinning, and the zone on corresponding the flash memory 15 of pinning LBA is known as pinned region (pinned region).Be endowed not that the LBA of pinning attribute information is known as the not LBA of pinning, the zone on corresponding the not flash memory 15 of pinning LBA is known as not pinned region.Therefore, as shown in Figure 2, pinned region 15a, not pinned region 15b and other regional 15c in flash memory 15, have been formed.
Article five, order request forms a dummy section with the big fraction of appointment in flash memory 15.When main process equipment 20 produces the 5th order; if existing dummy section is less than the dummy section that is required in the flash memory 15; the not pinned region 15b of controller 16 from flash memory 15 will specify size or more information to move on on the hard disk 14, and protect this to have the dummy section of specifying big fraction in flash memory 15.In this case, decided the information in which district among the not pinned region 15b of flash memory 15 to be moved in the hard disk by the judgement of controller 16, in other words, which zone in flash memory 15 forms dummy section.
Next explain flash interface 19.Flash interface 19 not only has the controller 16 and the flash memory 15 of connection, can transmit the function of information, and various counter 19a-19e are arranged, as shown in Figure 3.Each count value of counter 19a one 19e is stored in, and for example, in the nonvolatile memory, this storer is not presented on the figure, but is arranged in the flash interface 19.And can use flash memory 15 stored count values.
At first, the number of times of writing of counter 19a counting accumulation from make.The number of times of wiping of counter 19b counting accumulation from make.The frequency of the write error that counter 19c counting from make (perhaps resetting from each power supply input) is accumulated.The frequency of the read error that counter 19d counting from make (perhaps resetting from each power supply input) is accumulated.Counter 19e count accumulation handle the frequency of the mistake that is detected by error-detecting and correction (ECC), perhaps handle the frequency of the error recovery of making by ECC.Based on each count value among these counters 19a-19e, can judge the degradation mode of flash memory 15.
Fig. 4 has provided an example of controller 16.Controller 16 has an order analysis part 16a, and it is with the process decoding and the order that is provided by main process equipment 20 is provided.By the analysis result of this order analysis part 16a, determine a software among the architecture storer 16b, and in sequence controller 16c, set up an operation steps.
Sequence controller 16c comes control information flow by interface and bus controller 16d.For example, when the read and write of the information of carrying out, medium selects part 16e to determine that flash memory 15 still is a hard disk 14, and address control section 16f determines write address and reads the address.
In write information, write processing section 16g and carry out the transmittance process of write information or like that.In read message, read processing section 16h and carry out the transmittance process of read message or like that.
In addition, controller 16 has one to wipe processing section 16i.This wipes the erase process of the information of processing section 16i executive logging in flash memory 15, and this wipes the erase process that processing section 16i also can the information of executive logging on hard disk 14.
Controller 16 also has an address control section 16j.This address control section 16j controls posting field and the non-posting field or the suchlike address of flash memory 15 and hard disk 14 by the gross.In addition, also be provided for monitoring the state judgment part 16k of the driving condition of hard disk 14 in the controller 16.
Fig. 5 has provided an example of main process equipment 20.Main process equipment 20 has an operation part 20a for user's operation, and an importation 20b is arranged, and it obtains information based on the operation of operation part 20a from external network with from the specified message storage medium.
In addition, main process equipment 20 has a processing section 20c, the signal Processing that it carries out appointment to the information that is obtained by importation 20b, and produce an order for information storing device 11; And the display part 20d that the result of this processing section 20c is shown.
In addition, main process equipment 20 has an interface 20f, it outputs to outside (information storing device 11) by connector 20e information and the order as the result of processing section 20c, and by connector 20e the information of outside (information storing device 11) input is offered processing section 20c.
As previously described, but flash memory 15 is conditional (about 100,000 times) on number of rewrites, so, if surpass the visit of writing, read, wiping etc. of limited number of times, the probability of happening of the probability of happening of the incidence of write error and write error and ECC mistake just becomes big so.And if from same posting field read message repeatedly, it is big that the probability of happening of ECC mistake becomes.
Yet, in above-mentioned standard, do not define a method, take this information of the state of main process equipment 20 acquisition demonstration number of rewrites and erasing times, so, main process equipment 20 can not judge that whether flash memory 15 is in the state that makes a mistake easily physically, therefore, can cause problem on information storing device 11 when writing, reading with erasure information.
So, in the present embodiment, rebulid status request, to take this, main process equipment 20 is filed a request to information storing device 11, and obtains the status information of flash memory 15.
In this case, main process equipment 20 can lean on the judgement of self to produce a status request in predetermined timing.After receiving status request, controller 16 produces control, so that the information among each counter 19a-19e in the flash interface (as previously described, be recorded in, for example, in the flash memory 15) is passed to main process equipment 20, as the status information of flash memory 15.
Fig. 6 has provided an example handling operation, and wherein, main process equipment 20 produces a status request in predetermined timing.In other words, when handling (step S1) at first, the processing section 20c of main process equipment 20 carries out the processing of predetermined application software at step S2.
Then, the processing section 20c of main process equipment 20 judges whether that in step S3 the processing of described application software is done, if judged result is to finish (being), so, be that information storing device 11 produces a status request in step S4, and finish this process (step S5).
Fig. 7 has provided the example of the processing operation of controller 16 when receiving a status request.In other words, when handling beginning (step S6), controller judges whether to have imported status request in step S7, if being status request, judged result has been transfused to (being), controller 16 passes to main process equipment 20 with the information in each counter 19a-19e in the flash interface 19 in step S8, and finishes this process (step 9).
Fig. 8 has provided the example of the processing operation of main process equipment 20 when receiving the state request information of flash memory 15.In other words, when handling beginning (step S10) and the status information of flash memory 15 is transfused in step S11, processing section 20c judges based on described status information whether flash memory 15 is in the wrong state that is easy to generate in step S12.
In this case, by being compared, information among each counter 19a-19e of flash interface 19 and the reference value of setting up in advance make the judgement whether flash memory 15 is in the state that is easy to generate mistake.
If the result who judges is, flash memory 15 is to be in to be easy to generate wrong state (being), and so, processing section 20c takes a countermeasure that pre-establishes in step S13, and finishes processing procedure (step S14).If the result who judges is, flash memory 15 is not to be in to be easy to generate wrong state (denying), and so, processing section 20c finishes processing procedure, and (step 14) is not made change.
Here,, consider a method as a countermeasure among the above-mentioned steps S13, such as, for example, utilize above-mentioned the 5th order etc., with the information transfer in the flash memory 15 to hard disk 14, perhaps, after application software is finished dealing with, information is existed on the hard disk 14 by SDRAM 12.
According to the foregoing description, set up a status request once more, by this status request, 20 pairs of information storing devices 11 of main process equipment are filed a request and are obtained the status information of flash memory 15.
Therefore, main process equipment 20 can judge whether flash memory 15 is in the wrong state that is easy to generate based on the status information that is obtained.If the result who judges is that flash memory is to be in to be easy to generate wrong state, so, can take a countermeasure that pre-establishes to information storing device 11.Therefore, the degree of damage of the information that causes owing to the mistake of flash memory 15 just has been reduced, and can take some countermeasures so that do not damage the reliability of information as far as possible.
The invention is not restricted to the foregoing description, also be not limited to the embodiment state.Can revise and implement those constituent elements and not depart from its spiritual scope.And, in conjunction with a plurality of constituent elements of being announced in the above-described embodiments, can constitute various inventions by suitably.For example, delete some constituent elements in all constituent elements that can from the foregoing description, provide, and, can be suitably in conjunction with the constituent element that relates to different embodiment.

Claims (11)

1. information storing device is characterized in that comprising: importation (21), and it is configured to input command; Disk-shaped storage medium (14); Nonvolatile memory (15), it is configured to become the cache memory of above-mentioned disk-shaped storage medium (14); Collecting part (19a-19e), it is configured to the status information that acquisition shows the state of described nonvolatile memory (15); And a control section (16), its be configured to based on the write order that is input to above-mentioned importation (21) in described nonvolatile memory (15) write information, go up and based on exporting the status information that is obtained at above-mentioned collecting part (19a-19e) to described disk-shaped storage medium (14) in the predetermined information stores that regularly will be recorded on the described nonvolatile memory (15) in the status request of described importation (21) input.
2. information storing device according to claim 1 is characterized in that, above-mentioned status information comprises in the writing frequency, wipe frequency of described nonvolatile memory (15), write error frequency and the read error frequency any one.
3. information storing device according to claim 1 is characterized in that, above-mentioned status information comprises, by the described information of reading from described nonvolatile memory (15) is carried out the incorrect frequency that error recovery procedure is surveyed.
4. information storing device according to claim 1 is characterized in that, above-mentioned status information comprises, to the error recovery frequency of the described information of reading from described nonvolatile memory (15).
5. information storing device according to claim 1, it is characterized in that, above-mentioned collecting part (19a-19e) comprises counter, and described counter is configured to count about in the writing frequency, wipe frequency of described nonvolatile memory, write error frequency and the read error frequency any one.
6. information storing device according to claim 1 is characterized in that, above-mentioned disk-shaped storage medium (14) is a hard disk, and above-mentioned nonvolatile memory (15) is a flash memory.
7. main process equipment, described main process equipment is characterised in that and comprises:
Processing section (20c), it is configured to produce status request, is used for the status information that control section (16) the output collecting part (19a-19e) of solicited message memory device (11) obtained;
This information storing device (11) has the importation (21) of the input that is configured to carry out order, disk-shaped storage medium (14), be configured to become the nonvolatile memory (15) of the cache memory of described disk-shaped storage medium (14), be configured to show the collecting part (19a-19e) and the control section (16) of status information of the state of described nonvolatile memory (15), this control section (16) is configured to the write order write information in described nonvolatile memory (15) based on the described importation of plug (21) input, and the described information stores that will be recorded on the described nonvolatile memory (15) in predetermined timing arrives on the described disk-shaped storage medium (14).
8. main process equipment according to claim 7, it is characterized in that, above-mentioned processing section (20c) is configured to judge based on the described state of the status information that is provided by the above-mentioned status request of described information storing device (11) response to described nonvolatile memory (15), and takes the countermeasure that pre-establishes according to the result of its judgement.
9. main process equipment according to claim 8 is characterized in that, above-mentioned processing section (20c) thus be configured to judge by the state of described status information being compared with the reference value that pre-establishes to described nonvolatile memory (15).
10. the control method of an information storing device is characterized in that comprising: first process (21), and wherein order is transfused to; Second process, wherein based on the write order of being imported in described first process (21), information is written in the nonvolatile memory (15), and this nonvolatile memory becomes a cache memory of described disk-shaped storage medium (14); The 3rd process, wherein, the described information that is recorded in described second process in the above-mentioned nonvolatile memory (15) is stored in the above-mentioned disk-shaped storage medium (14) in predetermined timing; The 4th process (19a-19e) wherein, shows that the described status information of state of described nonvolatile memory (15) is obtained; The 5th process (S8), wherein, based on the status request of in described first process (21), being imported, the described status information that output is obtained in the 4th process (19a-19e).
11. the control method of information storing device according to claim 10, it is characterized in that, in above-mentioned the 4th process (19a-19e), obtain described status information about in the writing frequency, wipe frequency of described nonvolatile memory (15), write error frequency and the read error frequency any one by counting.
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